diff --git a/lib/pkp b/lib/pkp
index ed96a30fbb..5022403897 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit ed96a30fbb2df923ceaaad4e9e3396fc25906c74
+Subproject commit 502240389728e58998cc5f25ca356a7359a8d087